/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

var zrUtil = require("static/plugins/js/zrender/lib/core/util");

var lang = require("../lang");

var _dataProvider = require("../data/helper/dataProvider");

var retrieveRawValue = _dataProvider.retrieveRawValue;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
function _default(dom, ecModel) {
    var ariaModel = ecModel.getModel("aria");

    if (!ariaModel.get("show")) {
        return;
    } else if (ariaModel.get("description")) {
        dom.setAttribute("aria-label", ariaModel.get("description"));
        return;
    }

    var seriesCnt = 0;
    ecModel.eachSeries(function (seriesModel, idx) {
        ++seriesCnt;
    }, this);
    var maxDataCnt = ariaModel.get("data.maxCount") || 10;
    var maxSeriesCnt = ariaModel.get("series.maxCount") || 10;
    var displaySeriesCnt = Math.min(seriesCnt, maxSeriesCnt);
    var ariaLabel;

    if (seriesCnt < 1) {
        // No series, no aria label
        return;
    } else {
        var title = getTitle();

        if (title) {
            ariaLabel = replace(getConfig("general.withTitle"), {
                title: title,
            });
        } else {
            ariaLabel = getConfig("general.withoutTitle");
        }

        var seriesLabels = [];
        var prefix =
            seriesCnt > 1 ? "series.multiple.prefix" : "series.single.prefix";
        ariaLabel += replace(getConfig(prefix), {
            seriesCount: seriesCnt,
        });
        ecModel.eachSeries(function (seriesModel, idx) {
            if (idx < displaySeriesCnt) {
                var seriesLabel;
                var seriesName = seriesModel.get("name");
                var seriesTpl =
                    "series." + (seriesCnt > 1 ? "multiple" : "single") + ".";
                seriesLabel = getConfig(
                    seriesName
                        ? seriesTpl + "withName"
                        : seriesTpl + "withoutName"
                );
                seriesLabel = replace(seriesLabel, {
                    seriesId: seriesModel.seriesIndex,
                    seriesName: seriesModel.get("name"),
                    seriesType: getSeriesTypeName(seriesModel.subType),
                });
                var data = seriesModel.getData();
                window.data = data;

                if (data.count() > maxDataCnt) {
                    // Show part of data
                    seriesLabel += replace(getConfig("data.partialData"), {
                        displayCnt: maxDataCnt,
                    });
                } else {
                    seriesLabel += getConfig("data.allData");
                }

                var dataLabels = [];

                for (var i = 0; i < data.count(); i++) {
                    if (i < maxDataCnt) {
                        var name = data.getName(i);
                        var value = retrieveRawValue(data, i);
                        dataLabels.push(
                            replace(
                                name
                                    ? getConfig("data.withName")
                                    : getConfig("data.withoutName"),
                                {
                                    name: name,
                                    value: value,
                                }
                            )
                        );
                    }
                }

                seriesLabel +=
                    dataLabels.join(getConfig("data.separator.middle")) +
                    getConfig("data.separator.end");
                seriesLabels.push(seriesLabel);
            }
        });
        ariaLabel +=
            seriesLabels.join(getConfig("series.multiple.separator.middle")) +
            getConfig("series.multiple.separator.end");
        dom.setAttribute("aria-label", ariaLabel);
    }

    function replace(str, keyValues) {
        if (typeof str !== "string") {
            return str;
        }

        var result = str;
        zrUtil.each(keyValues, function (value, key) {
            result = result.replace(
                new RegExp("\\{\\s*" + key + "\\s*\\}", "g"),
                value
            );
        });
        return result;
    }

    function getConfig(path) {
        var userConfig = ariaModel.get(path);

        if (userConfig == null) {
            var pathArr = path.split(".");
            var result = lang.aria;

            for (var i = 0; i < pathArr.length; ++i) {
                result = result[pathArr[i]];
            }

            return result;
        } else {
            return userConfig;
        }
    }

    function getTitle() {
        var title = ecModel.getModel("title").option;

        if (title && title.length) {
            title = title[0];
        }

        return title && title.text;
    }

    function getSeriesTypeName(type) {
        return lang.series.typeNames[type] || "自定义图";
    }
}

module.exports = _default;
